StorageManager

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The StorageManager interface of the the Storage API provides an interface for managing persistance permissions and estimating available storage. You can get a reference to this interface using either navigator.storage or WorkerNavigator.storage.

Methods

StorageManager.estimate() Secure context
Returns a StorageEstimate object containing usage and quota numbers for your origin.
StorageManager.persist() Secure context
Returns a Promise that resolves to true if the user agent is able to persist your site's storage.
StorageManager.persisted() Secure context
Returns a Promise that resolves to true if persistence has already been granted for your site's storage.

Specifications

Specification Status Comment
Storage
The definition of 'StorageManger' in that specification.
Living Standard Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support48 ?

57

51 — 571 2

? Yes ?
estimate52 ?51 ? Yes ?
persist

52

48 — 524

?55 ? Yes ?
persisted

52

48 — 525

?55 ? Yes ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4848 ?511 3 Yes ? ?
estimate5252 ?51 Yes ? ?
persist

52

48 — 524

52

48 — 524

?55 Yes ? ?
persisted

52

48 — 525

52

48 — 525

?55 Yes ? ?

1. See bug 1304966 and bug 1399038.

2. From version 51 until version 57 (exclusive): this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

3. From version 51: this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

4. Supported as requestPersistent.

5. Supported as persistentPermission.

Document Tags and Contributors

Last updated by: connorshea,